Nut and pipe wrench.



Patented Sept; 26; I899.

8. J. BERN. NUT AND PIPE 'w'nzncu.

(Application filed Ian, 23, 1897.)

(No Model.)

In: wonms PETERS m, wno'rour uq. WASHINGTON. o. c,

UNITED STATES PATENT OFFICE.

SAMUEL J. DERN, OF PRAIRIE DEPOT, OHIO.

NUT AND PIPE WRENCH.

SPECIFICATION forming part of Letters Patent No. 633,640, dated September 26, 1899.

Application filed January 23, 1897. Serial No. 620,324. (No model.)

To all whom it may concern.-

Be it known that I, SAMUEL J. DERN, of Prairie Depot, county of W'ood, and State of Ohio, have invented certain new and useful Improvements in Nut and Pipe renches; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which form part of this specification.

Myinvention relates to an improvementin nut and pipe wrenches; and it has for its object to provide quickly and easily adjusted jaws and means whereby the jaw after it has been adjusted in position will be automatically locked in place.

My invention consists in a toothed shank and a sliding jaw combined with two pinions journaled in the jaw, two ratchet wheels placed upon thepinion-shafts,a doubleacting pawl which engages with both of the ratchetwheels,and a spring-actuated lever connected to the pawl, whereby both ratchet-wheels are engaged and disengaged at the same time, as will be more fully described hereinafter.

In the accompanying drawings, which represent my invention, Figure 1. is a side elevation, the pinions, the spring, and the bracket being shown in dotted lines. Fig. 2 is a plan View of one of the pinions and the ratchetwheel attached to one end of the shank.

1 represents the toothed shank, 2 the fixed jaw secured to one end thereof, and 3 the sliding jaw, which is adjusted by hand back and forth upon the shank at the will of the operator. Journaled in this sliding jaw are two shafts 5,and upon these shafts are formed or secured the two pinions 4, which engage with the teeth of the shank and serve to look the sliding jaw 3 in position. Upon one end of each of the shafts 5 is secured a ratchetwheel 6, and these ratchet-wheels are located upon the outer side of the sliding jaw 3 and have their teeth turned in opposite directions. It is immaterial upon which side of the jaw the two ratchet-wheels are located; but for the sake of convenience they are here shown upon the left side. Pivoted upon the shaft 11,which projects through one side of thejaw 3, is the operating-leverS, and to that end of the shaft ll which projects through the side of the jaw a double-acting cam 7 is secured. Under the outer end of the lever 8 is placed a spring 9, which has its lower end resting upon the bracket 10, formed between the two jaws. \Vhen the outer end of the lever 8 is depressed, the double-acting pawl '7 is disengaged from the two ratchet-wheels 6 and the jaw 3 is free to be adjusted upon the shank 1 by hand. As long as the outer end of the lever S is depressed the jaw can be drawn back and forth upon the shank at will; but the moment the end of the lever is released the spring 9 throws its free end upward and the double-acting pawl 7 instantly engages with both of the ratchet-wheels (5 and locks the jaw in position by preventing the pinions from revolving.

Having thus described my invention, I claim In a wrench, the shank made integral with the outer jaw, and provided with arack upon its inner edge, combined with the movable jaw, the bracket formed in the jaw, a spring placed upon the bracket, two pinions journaled in the jaw, and having their shafts provided with ratchet-wheels, a double-acting pawl pivoted between the two ratchet-wheels, and adapted to engage with them, and a lever pivoted in the jaw and connected atits inner end with the double-acting pawl, and which lever is operated upon by the spring placed upon the bracket so as to hold the pawl always in contact with both ratchet-wheels, substantially as shown and described.

In testimony that I claim the foregoing as my own I hereby affix my signature in presence of two witnesses.

SAMUEL J. DERN.

Nitnesses:

l/VILLIAM WEBSTER, H. H. M RTIN. 

